<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
	<title>Envelope</title>

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	<link rel="icon" type="image/png" sizes="174x174" href="./favicon.png">

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	<script src="../build/Tone.js"></script>
	<script src="./js/tone-ui.js"></script>
	<script src="./js/components.js"></script>
</head>
<body>	
	<style type="text/css">
		img {
			display: block;
			margin: 5px auto;
			width: 300px!important;
		}

		tone-trigger {
			margin-bottom: 10px;
		}
	</style>
	<tone-example label="Envelope">
		<div slot="explanation">
			Envelopes ramp amplitude, frequency or any other parameter over time. 
			<a href="https://tonejs.github.io/docs/Envelope">Tone.Envelope</a> and the classes that extend it
			implement an <a href="https://en.wikipedia.org/wiki/Synthesizer#ADSR_envelope" target="_blank">ADSR</a> envelope type
			which splits its ramp into four distinct phases: Attack, Decay, Sustain, Release.
			<img src="https://upload.wikimedia.org/wikipedia/commons/e/ea/ADSR_parameter.svg">
		</div>

		<div id="content">
			<tone-momentary-button></tone-momentary-button>
		</div>

	</tone-example>

	<script type="text/javascript">
		const env = new Tone.AmplitudeEnvelope({
			attack: 0.11,
			decay: 0.21,
			sustain: 0.5,
			release: 1.2
		}).toDestination();

		// create an oscillator and connect it to the envelope
		const osc = new Tone.Oscillator({
			partials: [3, 2, 1],
			type: "custom",
			frequency: "C#4",
			volume: -8,
		}).connect(env).start();

		// bind the interface
		drawer().add({
			tone: env,
			name: "Envelope"
		}).add({
			tone: osc,
		});

		document.querySelector("tone-momentary-button").addEventListener("down", e => env.triggerAttack());
		document.querySelector("tone-momentary-button").addEventListener("up", e => env.triggerRelease());
	</script>
</body>
</html>
